This science fair project idea provides evidence that air is everywhere and takes up space.

Experiment about connection of senses of taste and smell. Using blindfold and noseplugs, administer blind taste test. Analyze results and organize data.

This science fair project uses paper chromatography to investigate whether black, brown, orange, and purple are pure colors or mixtures of other colors.

Make a seed bomb and let your junior guerilla gardener spread flowers far and wide.

Chemistry isn't just incredible ... sometimes its edible! These crystal lollipops are a delicious introduction to chemistry concepts.

Find out whether putting something on top of a plant will inhibit its growth.

Grow potatoes in a plastic bag—easy to grow and harvest, and yummy to eat!

Create a soda bottle garden that defies gravity! This hanging terrarium is housed in a soda bottle and perfect for crafty kids with a growing green thumb.

Learn whether writing things down really makes things easier to remember.

In this popcorn experiment, students can explore how two things made out of the same material can have very different appearances and densities.

Your child can explore the wonders of science, and the concept of dehydration, along with creating a healthy and tasty treat!

Science fair project which tests various sedimentary, igneous and metamorphic rocks to find out whether one rock family is stronger than the others.

Science fair project in which you will learn more about the natural world by preserving and identifying different animal tracks.

Ever wonder why refrigerator lights turn off when you close the door? Does the darkness prevent food from spoiling? This experiment, determines just that.

With this science fair idea, little scientists will gain valuable insights into the physics behind throwing a baseball.

Help your child create a magical miniature garden in the most unlikely of places: a recycled plastic bottle!

This kinesthetic learning activity will help your fourth grader get a firm grasp on the immensity of the solar system.

The purpose of this science fair project is to study the properties of sugar and examine individual preferences for sugar and other sweeteners.

This study evaluates if electronic devices commonly found in most households emit radiation, and if they do, how much?

The purpose of this study is to determine if people can tell the difference between organic and conventional food from looking at, smelling and tasting it.

The rock cycle will come alive for your child when he uses broken crayons to create the three basic rock types.

This science fair project idea examines which type of insulation holds in the most heat.

This science fair project on testing water hardness is a great introduction to practical chemistry. Test and learn the difference between hard and soft water.

Would your child like to learn about a hidden world? All she needs to do is open her box of markers!

Show your fourth grader how to see her heart in action. Make a simple device out of a drinking straw and clay to help her spot the movement of her pulse!

Watch pre-packaged seeds and seeds taken from inside fruits and vegetables grow. Which ones will grow faster? Read more in this science fair project idea.

This science fair project idea explores how enzyme inhibitors, active sites, non-competitive enzyme inhibitors, and substrates work.

Find out whether a longer airplane will fly farther or a wider paper airplane.

The goal of this science fair project is to analyze differences between the taste and texture of frozen and fresh food.

This science fair project idea produces varying pitches of sound.